<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta charset="UTF-8">
</head>
<body>
<center>
<h2>学生管理系统</h2>
<form action="indexAction.php" method="post">
    账号名：<br>
    <input type="text" name="username" maxlength="20">
    <br>
    密码：<br>
    <input type="password" name="password" maxlength="20">
    <br>
    <button type="submit">登陆</button>
    <button type="reset">重置</button>
</form>
</center>
</body>
</html>